An extraction device

Abstract

The present invention relates to the field of extraction, and discloses an extraction device, comprising an extraction barrel and a support column, wherein the bottom end of the stirring barrel is supported by the support column, an extraction structure is arranged at the bottom of the extraction barrel, a lifting plate is arranged at the top of the extraction barrel through a lifting structure, a grinding structure is arranged on the lifting plate, a plurality of grinding barrels are arranged in the extraction barrel through a conversion structure, a feed tube is fixedly passed through the upper edge of the extraction barrel, the bottom end of the feed tube extends to the top of the corresponding grinding barrel, a feeding hopper is installed on the top of the feed tube, when it is necessary to clean the grinding barrel, in conjunction with the first transmission structure, the lifting structure can drive the grinding as a whole on the rotating rod of the grinding structure to move up and down, while the conversion disk on the conversion structure is automatically driven to rotate, and the next grinding barrel is converted in time, so that the extraction work can continue in the process of cleaning the grinding barrel, thereby greatly improving the work efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of coffee extraction, and in particular to an extraction device. Background Art

[0002] Coffee is one of the most popular ingredients in the world. When making coffee, coffee beans need to be extracted and refined, and extraction equipment is used;

[0003] The extraction device in the prior art can grind the unground coffee beans into powder through the grinding mechanism, and is provided with a screen, so that the unground coffee beans can be kept in the grinding cylinder until they are ground into powder, so that the grinding effect of the coffee beans is better, and there will be no large coffee bean particles in the extraction process, which will lead to poor coffee bean extraction effect. In addition, the device directly puts the coffee beans into the grinding cylinder, thereby not causing waste of coffee.

[0004] However, after long-term use, the extraction equipment in the prior art needs to clean the grinding cylinder and the screen for grinding coffee beans, so the grinding cylinder and the screen need to be removed from the equipment for cleaning. During the cleaning process, the equipment cannot perform the extraction work normally, which reduces the extraction efficiency. Therefore, there is room for improvement. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides an extraction device.

[0006] The present invention provides an extraction device that adopts the following technical solution:

[0007] An extraction device comprises an extraction barrel and a support column, wherein the bottom end of the extraction barrel is supported by the support column, an extraction structure is arranged at the bottom of the extraction barrel, a lifting plate is arranged at the top of the extraction barrel through a lifting structure, a grinding structure is arranged on the lifting plate, a plurality of grinding cylinders are arranged in the extraction barrel through a conversion structure, a feed tube is fixedly passed through the upper edge of the extraction barrel, the bottom end of the feed tube extends to the top of the corresponding grinding cylinder, and a feeding hopper is installed on the top of the feed tube;

[0008] The grinding structure includes a first motor installed in the middle of the lifting plate, the bottom end of the output shaft of the first motor is connected to a rotating rod, the rotating rod is rotated and inserted into the extraction barrel, and the rotating rod is inserted into the distribution in the corresponding grinding cylinder and a plurality of grinding rods are installed;

[0009] The lifting structure comprises four convex strips arranged on the side of the lifting plate, and cylinders are installed on the extraction barrel directly below two of the convex strips, and the top ends of the cylinder output shafts are connected to the corresponding convex strips, and guide columns are movably passed through the other two convex strips, and the bottom ends of the guide columns are connected to the extraction barrel;

[0010] The conversion structure includes a rotating shaft that rotates and passes through the top of the extraction barrel near the edge, a first transmission structure is arranged between the top of the rotating shaft and the lifting plate, a conversion disk is fixedly sleeved on the bottom end of the rotating shaft, an opening for the conversion disk to pass through is opened on the extraction barrel, a cleaning cover is arranged at the position of the opening on the extraction barrel, an upper cleaning structure is arranged on the top of the cleaning cover, a flushing structure is arranged on the bottom of the cleaning cover, a plurality of the grinding cylinders are installed on the conversion disk at equal angles around the circumference, a feed trough is opened on the conversion disk at the position of each grinding cylinder, and a screen is installed in the feed trough.

[0011] Preferably, the first transmission structure includes a transmission column connected to the top of the rotating shaft, a driving cylinder is movably sleeved on the transmission column, an insertion rod is fixedly inserted into the driving cylinder near the bottom end, a driving rod is connected to the driving cylinder near the middle, the bottom end of the driving rod is connected to one of the convex strips, a plurality of first vertical grooves are opened at equal angles on the circumference of the transmission column, an arc groove connecting one side of the top of the first vertical groove is opened on the transmission column, a connecting groove connecting the other side of the top of the first vertical groove is opened on the transmission column, a second vertical groove connecting the top of the connecting groove is opened on the transmission column, two adjacent second vertical grooves are connected to the arc groove, and one end of the insertion rod is slidably set in the first vertical groove.

[0012] Preferably, the extraction structure includes a stirring drum installed in the middle of the lower inner wall of the extraction barrel, a second motor is installed in the middle of the lower side of the extraction barrel, a stirring rod inserted into the stirring drum is connected to the top end of the output shaft of the second motor, a plurality of stirring columns are installed on the side of the stirring rod, a water inlet pipe is installed in the middle of the side of the extraction barrel, one end of the water inlet pipe is inserted into the top end of the stirring drum, a liquid outlet pipe is connected to the bottom end of the stirring drum, the liquid outlet pipe is arranged to pass through the extraction barrel, and a funnel is installed on the inner wall of the extraction barrel at the top end of the stirring drum.

[0013] Preferably, the upper cleaning structure includes a rotating drum that rotates and passes through the upper edge of the cleaning cover, a rotating plate that movably passes through the rotating drum, the end face of the rotating plate is square, an upper plate is installed on the bottom end of the rotating plate, bristles are provided at the bottom of the upper plate, a side cleaning structure is provided on the top of the upper plate, an annular groove is provided on the rotating plate near the top, a driving plate movably passes through the annular groove, a first gear is fixed on the rotating drum near the top, two electric telescopic rods are installed below the driving plate on the top of the cleaning cover, the top end of the electric telescopic rod output shaft is connected to the driving plate, a lower cleaning structure is provided below the cleaning cover and below the rotating plate, and a second transmission structure is provided on the side of the cleaning cover away from the extraction barrel.

[0014] Preferably, the side cleaning structure comprises a cleaning cylinder installed at the upper edge of the upper plate, a water leakage port is provided at the bottom end of the cleaning cylinder, and bristles are arranged on the side of the cleaning cylinder.

[0015] Preferably, the lower cleaning structure includes a cleaning rod that rotates and passes under the cleaning cover, the cleaning rod is directly below the rotating plate, a lower plate is installed on the top of the cleaning rod, bristles are arranged on the upper part of the lower plate, and a second gear is fixed on the bottom end of the cleaning rod.

[0016] Preferably, the second transmission structure includes a fixed plate installed on the side of the cleaning cover away from the extraction barrel, a transmission rod rotatably passes through the fixed plate, a third gear is fixed on the top end of the transmission rod, and the third gear is meshingly connected with the first gear, a sixth gear is fixed on the bottom end of the transmission rod, and the sixth gear is meshingly connected with the second gear, a fourth gear is fixed on the transmission rod near the middle, a third motor is installed on the bottom of the fixed plate, and the output shaft of the third motor passes through a fifth gear fixed on the top end of the fixed plate, and the fifth gear is meshingly connected with the fourth gear.

[0017] Preferably, the flushing structure includes a water storage cylinder installed under the cleaning cover near the cleaning rod, a water pump is installed at the bottom end of the side of the water storage cylinder, a water supply pipe is connected to the water pump, the water supply pipe is fixed through a fixed plate, a plurality of fixed pipes are connected to the water supply pipe, and a nozzle is installed on one end of each of the fixed pipes inserted into the cleaning cover.

[0018] In summary, the present invention includes the following beneficial technical effects:

[0019] The present invention is provided with a grinding structure, an extraction structure, a lifting structure, a conversion structure and a first transmission structure. When the grinding cylinder needs to be cleaned, the first transmission structure can be used to automatically drive the conversion disk on the conversion structure to rotate while the lifting structure drives the grinding body on the rotating rod of the grinding structure to move up and down, so as to timely switch the next grinding cylinder, so that the extraction work can continue during the process of cleaning the grinding cylinder, thereby greatly improving the work efficiency.

[0020] The present invention provides an upper cleaning structure, a lower cleaning structure, a second transmission structure, a side cleaning structure and a flushing structure on the cleaning cover, so that when the conversion disk drives the corresponding grinding cylinder to rotate into the cleaning cover, the inner wall of the grinding cylinder and the upper and lower surfaces of the screen can be automatically brushed, and the operation is more labor-saving and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of an extraction device in an embodiment of the present invention;

[0022] Figure 2 In the embodiment of the present invention Figure 1 A magnified view of the structure at A;

[0023] Figure 3 is a schematic diagram of the structure below the extraction barrel in an embodiment of the present invention;

[0024] Figure 4 Schematic diagram of the structure inside the extraction barrel and the mixing barrel in the embodiment of the present invention;

[0025] Figure 5 is a schematic diagram of the structure below the conversion disk in an embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the internal structure of the cleaning cover in an embodiment of the present invention;

[0027] Figure 7 In the embodiment of the present invention Figure 6 A magnified view of the structure at B;

[0028] Figure 8 In the embodiment of the present invention Figure 6 A magnified view of the structure at C;

[0029] Fig. 9 Schematic diagram of the structure of the transmission column in an embodiment of the present invention.

[0030] Description of the reference numerals: 1, extraction barrel; 2, support column; 3, first motor; 4, rotating rod; 5, conversion disk; 6, rotating shaft; 7, grinding cylinder; 8, feeding trough; 9, screen; 10, lifting plate; 11, guide column; 12, convex strip; 13, cylinder; 14, cleaning cover; 15, opening; 16, driving rod; 17, transmission column; 18, driving cylinder; 19, insertion rod; 20, first vertical groove; 21, arc groove; 22, second vertical groove; 23, connecting groove; 24, stirring cylinder; 25, funnel; 26, second motor; 27, stirring rod; 28, stirring column; 2 9. Water inlet pipe; 30. Liquid outlet pipe; 31. Feeding hopper; 32. Rotating drum; 33. Rotating plate; 34. Driving plate; 35. Electric telescopic rod; 36. First gear; 37. Upper plate; 38. Cleaning drum; 39. Leakage port; 40. Cleaning rod; 41. Lower plate; 42. Second gear; 43. Fixed plate; 44. Transmission rod; 45. Third gear; 46. Fourth gear; 47. Third motor; 48. Fifth gear; 49. Sixth gear; 50. Water storage cylinder; 51. Water pump; 52. Water delivery pipe; 53. Fixed pipe; 54. Sprinkler; 55. Discharge pipe. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-Figure 9 The present invention is described in further detail.

[0032] Reference Figure 1-Figure 9 The embodiment of the present invention discloses an extraction device, including an extraction barrel 1 and a support column 2. The bottom end of the extraction barrel 1 supports the support column 2. An extraction structure is arranged at the bottom of the extraction barrel 1. A lifting plate 10 is arranged above the extraction barrel 1 through a lifting structure. A grinding structure is arranged on the lifting plate 10. A plurality of grinding cylinders 7 are arranged in the extraction barrel 1 through a conversion structure. A feed pipe 55 is fixedly passed through the upper edge of the extraction barrel 1. The bottom end of the feed pipe 55 extends to the top of the corresponding grinding cylinder 7. A feeding hopper 31 is installed on the top of the feed pipe 55.

[0033] The grinding structure includes a first motor 3 installed in the middle of the lifting plate 10, and a rotating rod 4 is connected to the bottom end of the output shaft of the first motor 3. The rotating rod 4 is rotated and inserted into the extraction barrel 1. The rotating rod 4 is inserted into the distribution of the corresponding grinding cylinder 7 and a plurality of grinding rods are installed;

[0034] The lifting structure includes four convex strips 12 arranged on the side of the lifting plate 10, and cylinders 13 are installed on the extraction barrel 1 directly below two of the convex strips 12. The top of the output shaft of the cylinder 13 is connected to the corresponding convex strip 12, and guide columns 11 are movably passed through the other two convex strips 12, and the bottom of the guide column 11 is connected to the extraction barrel 1;

[0035] The conversion structure includes a rotating shaft 6 that rotates and passes through the top of the extraction barrel 1 near the edge, a first transmission structure is arranged between the top of the rotating shaft 6 and the lifting plate 10, a conversion disk 5 is fixedly sleeved on the bottom end of the rotating shaft 6, an opening 15 for the conversion disk 5 to pass through is opened on the extraction barrel 1, a cleaning cover 14 is arranged at the position of the opening 15 on the extraction barrel 1, an upper cleaning structure is arranged above the cleaning cover 14, a flushing structure is arranged below the cleaning cover 14, a plurality of grinding cylinders 7 are installed on the conversion disk 5 at equal angles around the circumference, a material discharge trough 8 is opened on the conversion disk 5 at the position of each grinding cylinder 7, and a screen 9 is installed in the material discharge trough 8;

[0036] The extraction structure includes a stirring drum 24 installed in the middle of the lower inner wall of the extraction barrel 1, a second motor 26 is installed in the middle of the lower side of the extraction barrel 1, a stirring rod 27 inserted into the stirring drum 24 is connected to the top of the output shaft of the second motor 26, and a plurality of stirring columns 28 are installed on the side of the stirring rod 27. A water inlet pipe 29 is installed in the middle of the side of the extraction barrel 1, one end of the water inlet pipe 29 is inserted into the top of the stirring drum 24, and a liquid outlet pipe 30 is connected to the bottom of the stirring drum 24, and the liquid outlet pipe 30 is arranged outside the extraction barrel 1. A funnel 25 is installed on the inner wall of the extraction barrel 1 at the top of the stirring drum 24, and coffee beans to be ground are added to the feeding hopper 31, and the coffee beans are discharged from the discharge pipe 55 to the corresponding grinding drum 7, and the first motor 3 is started to drive the rotating rod 4 and the grinding rod to rotate as a whole, and the grinding rod grinds the coffee beans in the grinding drum 7. The coffee bean powder after grinding is discharged from the screen 9 and the funnel 25 into the mixing drum 24, and then water is added to the mixing drum 24 from the water inlet pipe 29. The second motor 26 is started to drive the stirring rod 27 and the stirring column 28 to rotate as a whole in the mixing drum 24 to perform the extraction work, and the extracted coffee liquid is released from the liquid outlet pipe 30. When the corresponding grinding drum 7 and the screen 9 are used for a long time and need to be cleaned, the cylinder 13 can be started to drive the lifting plate 10 to move upward, drive the rotating rod 4 and the grinding rod to be moved out of the corresponding grinding drum 7 as a whole, and then use the rotating shaft 6 to drive the conversion disk 5 to rotate to rotate the corresponding grinding drum 7 for cleaning. At the same time, the adjacent grinding drum 7 is rotated into the extraction barrel 1, and the cylinder 13 drives the rotating rod 4 and the grinding rod to be inserted into the corresponding grinding drum 7 as a whole, and the grinding and extraction work is continued, thereby improving the work efficiency.

[0037] See also Figure 1 , Figure 4 , Figure 5 , Figure 6 and Fig. 9The first transmission structure includes a transmission column 17 connected to the top of the rotating shaft 6, a driving cylinder 18 is movably sleeved on the transmission column 17, an insertion rod 19 is fixedly inserted into the driving cylinder 18 near the bottom, a driving rod 16 is connected to the driving cylinder 18 near the middle, the bottom end of the driving rod 16 is connected to one of the convex strips 12, a plurality of first vertical grooves 20 are opened at equal angles on the circumference of the transmission column 17, an arc groove 21 is opened on the transmission column 17 to connect one side of the top of the first vertical groove 20, a connecting groove 23 is opened on the transmission column 17 to connect the other side of the top of the first vertical groove 20, and a connecting groove 23 is opened on the transmission column 17 to connect the connecting groove 20. The second vertical groove 22 at the top of the lifting plate 10 is connected to the arc groove 21, and the two adjacent second vertical grooves 22 are connected to each other. One end of the insertion rod 19 is slidably arranged in the first vertical groove 20. When the lifting plate 10 moves up and down, the driving cylinder 18 and the insertion rod 19 are driven to move up and down as a whole through the driving rod 16. The sliding of one end of the insertion rod 19 in the first vertical groove 20, the arc groove 21, the second vertical groove 22 and the connecting groove 23 can drive the transmission column 17, the rotating shaft 6 and the conversion disk 5 to rotate as a whole, and then the corresponding grinding cylinder 7 is automatically converted to perform grinding and extraction work, which is more labor-saving and convenient to operate, and further improves the work efficiency.

[0038] See also Figure 1-Figure 8 The upper cleaning structure includes a rotating drum 32 that rotates and passes through the upper edge of the cleaning cover 14. The cleaning cover 14 is connected to a drain pipe. A rotating plate 33 is movable through the rotating drum 32. The end surface of the rotating plate 33 is square-shaped. An upper disk 37 is installed on the bottom end of the rotating plate 33. Brush bristles are arranged at the bottom of the upper disk 37. A side cleaning structure is arranged on the upper part of the upper disk 37. An annular groove is opened near the top of the rotating plate 33. A driving disk 34 is movable through the annular groove. A first gear 36 is fixedly sleeved near the top of the rotating drum 32. Two electric telescopic rods 35 are installed below the driving disk 34 on the top of the cleaning cover 14. The top end of the output shaft of the electric telescopic rod 35 is connected to the driving disk 34. A lower cleaning structure is arranged below the rotating plate 33 below the cleaning cover 14. A second transmission structure is arranged at a position of the side of the cleaning cover 14 away from the extraction barrel 1;

[0039] The side cleaning structure includes a cleaning cylinder 38 installed at the upper edge of the upper plate 37, a water leakage port 39 is opened at the bottom of the cleaning cylinder 38, and bristles are arranged on the side of the cleaning cylinder 38;

[0040] The lower cleaning structure includes a cleaning rod 40 that rotates and passes under the cleaning cover 14. The cleaning rod 40 is located directly below the rotating plate 33. A lower plate 41 is installed on the top of the cleaning rod 40. Bristles are arranged on the upper surface of the lower plate 41. A second gear 42 is fixedly sleeved on the bottom end of the cleaning rod 40.

[0041] The second transmission structure includes a fixed plate 43 installed on the side of the cleaning cover 14 away from the extraction barrel 1, a transmission rod 44 is rotatably passed through the fixed plate 43, a third gear 45 is fixedly sleeved on the top of the transmission rod 44, and the third gear 45 is meshed and connected with the first gear 36, a sixth gear 49 is fixedly sleeved on the bottom end of the transmission rod 44, and the sixth gear 49 is meshed and connected with the second gear 42, a fourth gear 46 is fixedly sleeved near the middle of the transmission rod 44, a third motor 47 is installed at the bottom of the fixed plate 43, and the output shaft of the third motor 47 passes through a fifth gear 48 fixedly sleeved on the top of the fixed plate 43, and the fifth gear 48 is meshed and connected with the fourth gear 46;

[0042] The flushing structure includes a water storage cylinder 50 installed under the cleaning cover 14 near the cleaning rod 40, a water pump 51 is installed at the bottom end of the side of the water storage cylinder 50, a water supply pipe 52 is connected to the water pump 51, the water supply pipe 52 is fixedly passed through the fixed plate 43, and a plurality of fixed pipes 53 are connected to the water supply pipe 52, and a nozzle 54 is installed on one end of each fixed pipe 53 inserted into the cleaning cover 14. When the grinding cylinder 7 with cleaning is rotated to the position between the upper plate 37 and the lower plate 41 with the conversion plate 5, the electric telescopic rod 35 is started to drive the upper plate 37 and the cleaning cylinder 38 to move downward as a whole and insert into the grinding cylinder 7. At the same time, the third motor 47 on the fixed plate 43 is started, and the transmission rod 44, the third gear 45 and the sixth gear 49 are driven to rotate as a whole through the fifth gear 48 and the fourth gear 46, and the first gear 36 and the second gear 42 are cooperated to drive the upper plate 37, the cleaning cylinder 38, the lower plate 41 and the bristles to rotate as a whole, so as to automatically clean the inner wall of the grinding cylinder 7 and the upper and lower surfaces of the screen 9. During cleaning, the water pump 51 can also be started to pump water in the water storage cylinder 50 into the nozzle 54, which is sprayed out by the nozzle 54 to flush, thereby realizing automatic brushing of the grinding cylinder 7.

[0043] The implementation principle of an extraction device according to an embodiment of the present invention is as follows: first, coffee beans to be ground are added to the hopper 31, the coffee beans are fed from the feed pipe 55 to the corresponding grinding cylinder 7, the first motor 3 is started to drive the rotating rod 4 and the grinding rod to rotate as a whole, the grinding rod grinds the coffee beans in the grinding cylinder 7, the ground coffee bean powder is fed from the screen 9 and the funnel 25 to the mixing cylinder 24, then water is added to the mixing cylinder 24 from the water inlet pipe 29, the second motor 26 is started to drive the stirring rod 27 and the stirring column 28 to rotate as a whole in the mixing cylinder 24, The extraction work is carried out, and the extracted coffee liquid is released from the liquid outlet pipe 30. When the corresponding grinding cylinder 7 and the screen 9 are used for a long time and need to be cleaned, the cylinder 13 can be started to drive the lifting plate 10 to move upward, drive the rotating rod 4 and the grinding rod to move out of the corresponding grinding cylinder 7 as a whole, and then use the rotating shaft 6 to drive the conversion plate 5 to rotate to rotate the corresponding grinding cylinder 7 for cleaning. At the same time, the adjacent grinding cylinder 7 is rotated into the extraction barrel 1, and the cylinder 13 drives the rotating rod 4 and the grinding rod to be inserted into the corresponding grinding cylinder 7 as a whole, and the grinding extraction work continues. In the process of the lifting plate 10 moving up and down, the driving rod 16 drives the driving cylinder 18 and the insertion rod 19 to move up and down as a whole. The sliding of one end of the insertion rod 19 in the first vertical groove 20, the arc groove 21, the second vertical groove 22 and the connecting groove 23 can drive the transmission column 17, the rotating shaft 6 and the conversion plate 5 to rotate as a whole, and then automatically convert the corresponding grinding cylinder 7 to perform grinding and extraction work. When the grinding cylinder 7 to be cleaned is rotated into the position between the upper plate 37 and the lower plate 41 in the cleaning cover 14, the third motor 47 on the fixed plate 43 is started, and the fifth motor 47 is driven to rotate. The gear 48 and the fourth gear 46 drive the transmission rod 44, the third gear 45 and the sixth gear 49 to rotate as a whole, and cooperate with the first gear 36 and the second gear 42 to drive the upper plate 37, the cleaning cylinder 38, the lower plate 41 and the bristles to rotate as a whole, so as to automatically clean the inner wall of the grinding cylinder 7 and the upper and lower surfaces of the screen 9. During cleaning, the water pump 51 can also be started to draw water in the water storage cylinder 50 into the nozzle 54, which is sprayed out by the nozzle 54 for flushing, thereby realizing automatic brushing of the grinding cylinder 7. The operation is simple and convenient, and the work efficiency is higher.

[0044] The above are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An extraction device, comprising an extraction barrel (1) and a support column (2), characterized in that: The bottom end of the extraction barrel (1) is supported by a support column (2), an extraction structure is arranged at the bottom of the extraction barrel (1), a lifting plate (10) is arranged at the top of the extraction barrel (1) through a lifting structure, a grinding structure is arranged on the lifting plate (10), a plurality of grinding cylinders (7) are arranged in the extraction barrel (1) through a conversion structure, a feed tube (55) is fixedly passed through the upper edge of the extraction barrel (1), the bottom end of the feed tube (55) extends to the top of the corresponding grinding cylinder (7), and a feeding hopper (31) is installed on the top of the feed tube (55); The grinding structure comprises a first motor (3) mounted in the middle of the upper part of the lifting plate (10); a rotating rod (4) is connected to the bottom end of the output shaft of the first motor (3); the rotating rod (4) is rotated and inserted into the extraction barrel (1); and a plurality of grinding rods are installed on the distribution of the rotating rod (4) inserted into the corresponding grinding cylinder (7); The lifting structure comprises four convex strips (12) arranged on the side of the lifting plate (10), and cylinders (13) are installed on the extraction barrel (1) directly below two of the convex strips (12), the top end of the output shaft of the cylinder (13) is connected to the corresponding convex strip (12), and guide columns (11) are movably passed through the other two convex strips (12), and the bottom ends of the guide columns (11) are connected to the extraction barrel (1); The conversion structure comprises a rotating shaft (6) which rotates and passes through the top of the extraction barrel (1) near the edge, a first transmission structure is arranged between the top of the rotating shaft (6) and the lifting plate (10), a conversion disk (5) is fixedly sleeved on the bottom of the rotating shaft (6), an opening (15) is provided on the extraction barrel (1) for the conversion disk (5) to pass through, a cleaning cover (14) is arranged at the position of the opening (15) on the extraction barrel (1), an upper cleaning structure is arranged above the cleaning cover (14), a flushing structure is arranged below the cleaning cover (14), a plurality of grinding cylinders (7) are mounted on the conversion disk (5) at equal angles on the circumference, a material discharge trough (8) is provided on the conversion disk (5) at the position of each grinding cylinder (7), and a screen (9) is installed in the material discharge trough (8).

2. An extraction device according to claim 1, characterized in that: The first transmission structure comprises a transmission column (17) connected to the top end of the rotating shaft (6); a driving cylinder (18) is movably sleeved on the transmission column (17); an insertion rod (19) is fixedly inserted into the driving cylinder (18) at a position close to the bottom end; a driving rod (16) is connected to the driving cylinder (18) at a position close to the middle; the bottom end of the driving rod (16) is connected to one of the convex strips (12); a plurality of first vertical grooves (20) are provided at equal angles on the circumference of the transmission column (17); an arcuate groove (21) is provided on the transmission column (17) to communicate with one side of the top end of the first vertical groove (20); a connecting groove (23) is provided on the transmission column (17) to communicate with the other side of the top end of the first vertical groove (20); a second vertical groove (22) is provided on the transmission column (17) to communicate with the top end of the connecting groove (23); two adjacent second vertical grooves (22) are connected to the arcuate groove (21); and one end of the insertion rod (19) is slidably arranged in the first vertical groove (20).

3. An extraction device according to claim 1, characterized in that: The extraction structure comprises a stirring drum (24) installed in the middle of the lower inner wall of the extraction barrel (1); a second motor (26) is installed in the middle of the lower side of the extraction barrel (1); a stirring rod (27) inserted into the stirring drum (24) is connected to the top end of the output shaft of the second motor (26); a plurality of stirring columns (28) are installed on the side of the stirring rod (27); a water inlet pipe (29) is installed in the middle of the side of the extraction barrel (1); one end of the water inlet pipe (29) is inserted into the top end of the stirring drum (24); a liquid outlet pipe (30) is connected to the bottom end of the stirring drum (24); the liquid outlet pipe (30) passes through the extraction barrel (1); and a funnel (25) is installed on the inner wall of the extraction barrel (1) at the top end of the stirring drum (24).

4. An extraction device according to claim 1, characterized in that: The upper cleaning structure comprises a rotating drum (32) which rotates and passes through the upper edge of the cleaning cover (14); a rotating plate (33) is movably passed through the rotating drum (32); the end surface of the rotating plate (33) is in a square shape; an upper plate (37) is mounted on the bottom end of the rotating plate (33); bristles are arranged on the bottom of the upper plate (37); a side cleaning structure is arranged on the top of the upper plate (37); an annular groove is provided on the rotating plate (33) near the top end; a driving force is movably passed through the annular groove; The rotary drum (32) is provided with a first gear (36) fixedly sleeved near the top end thereof; two electric telescopic rods (35) are installed above the cleaning cover (14) and below the driving plate (34); the top ends of the output shafts of the electric telescopic rods (35) are connected to the driving plate (34); a lower cleaning structure is provided below the cleaning cover (14) and below the rotating plate (33); and a second transmission structure is provided on the side of the cleaning cover (14) at a position away from the extraction barrel (1).

5. An extraction device according to claim 4, characterized in that: The side cleaning structure comprises a cleaning cylinder (38) mounted on the upper edge of the upper plate (37), a water leakage port (39) being provided at the bottom end of the cleaning cylinder (38), and bristles being arranged on the side of the cleaning cylinder (38).

6. An extraction device according to claim 5, characterized in that: The lower cleaning structure comprises a cleaning rod (40) which rotates and passes through the bottom of the cleaning cover (14); the cleaning rod (40) is located directly below the rotating plate (33); a lower plate (41) is mounted on the top of the cleaning rod (40); bristles are arranged on the top of the lower plate (41); and a second gear (42) is fixedly sleeved on the bottom of the cleaning rod (40).

7. An extraction device according to claim 4, characterized in that: The second transmission structure comprises a fixed plate (43) mounted on a side of the cleaning cover (14) away from the extraction barrel (1), a transmission rod (44) rotatably passing through the fixed plate (43), a third gear (45) fixedly sleeved on the top end of the transmission rod (44), the third gear (45) meshingly connected with the first gear (36), a sixth gear (49) fixedly sleeved on the bottom end of the transmission rod (44), the sixth gear (49) meshingly connected with the second gear (42), a fourth gear (46) fixedly sleeved near the middle of the transmission rod (44), a third motor (47) mounted below the fixed plate (43), an output shaft of the third motor (47) passing through a fifth gear (48) fixedly sleeved on the top end of the fixed plate (43), the fifth gear (48) meshingly connected with the fourth gear (46).

8. An extraction device according to claim 1, characterized in that: The flushing structure comprises a water storage cylinder (50) installed below the cleaning cover (14) near the cleaning rod (40), a water pump (51) being installed at the bottom end of the side of the water storage cylinder (50), a water supply pipe (52) being connected to the water pump (51), the water supply pipe (52) being fixedly passed through a fixing plate (43), a plurality of fixed pipes (53) being connected to the water supply pipe (52), and a nozzle (54) being installed on one end of each of the fixed pipes (53) inserted into the cleaning cover (14).

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